Positioner applicable to mitre elbow welding

Abstract

The invention relates to the technical field of mechanical engineering, aims to solve the problems that in the prior art, a positioner cannot adapt to welding of mitre elbows with different diameters, lengths and angles at the same time, the position of a welding seam is difficult to adjust flexibly, and integration and operation convenience are poor, and provides a positioner suitable for welding of mitre elbows. The device comprises an automatic control system, a sliding rail base, a fixing frame, a bottom rail moving assembly, a driving positioner and a driven positioner. The driving positioner is provided with a first box body, a clamp assembly and a driving assembly, the driven positioner is provided with a second box body, a clamp assembly and a brake assembly, the clamp assemblies are connected with the corresponding box bodies in a screwed mode, the driving assembly is connected with the first clamp assembly, and the brake assembly brakes the second clamp assembly. The device has the beneficial effects that the device can be suitable for welding operation of mitre elbows with different diameters, lengths and angles at the same time, welding seams can be flexibly and accurately adjusted to needed welding positions, the device integration degree is high, operation is convenient and fast, and the efficiency and precision of welding operation are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of mechanical engineering technology, and more specifically, to a positioner applicable to the welding of shrimp-shaped elbows. Background Technology

[0002] In the field of welding processing of shrimp waist elbows, due to different application scenarios, shrimp waist elbows have multiple specifications of diameter, length and spatial angle design. Welding operations require precise adjustment of the connecting weld of elbows of different specifications to the appropriate position in order to ensure welding quality and work efficiency. This places high demands on the clamping adaptability, position and angle adjustment capabilities of the positioner.

[0003] Most conventional welding positioners on the market are designed for single specifications and can only achieve basic rotation or simple movement functions. They cannot simultaneously adapt to the clamping and positioning needs of elbows of different diameters and lengths. Furthermore, they lack a flexible spatial angle adjustment structure, making it difficult to make precise angle and displacement adjustments according to changes in the weld position. This results in poor adaptability of the equipment to welding elbows of multiple specifications.

[0004] Meanwhile, traditional positioners have a low degree of integration in their adjustment structure and are cumbersome to operate. For welding operations of different specifications of shrimp-shaped elbows, it is necessary to change the fixture or adjust the equipment multiple times. This not only increases the cost of manual operation, but also easily affects the welding accuracy of the weld seam due to adjustment errors. It cannot meet the high-efficiency and precise welding requirements of multi-specification shrimp-shaped elbows in industrial production. Therefore, it is urgent to develop a special positioner with strong adaptability and flexible adjustment to solve the above technical problems. Summary of the Invention

[0005] The present invention aims to provide a positioner applicable to the welding of small waist elbows, so as to solve the problems in the prior art where positioners cannot simultaneously adapt to the welding of small waist elbows with different diameters, lengths and angles, making it difficult to flexibly adjust the weld position and resulting in poor integration and ease of operation.

[0006] The embodiments of the present invention are implemented as follows: This invention provides a positioner applicable to the welding of shrimp-shaped elbows, which includes an automated control system that coordinates the operation of a control slide rail base, a fixed frame, a bottom rail moving assembly, a drive positioner, and a driven positioner. The aforementioned drive positioner bolts are fixed to the aforementioned fixed frame, the aforementioned driven positioner bolts are fixed to the aforementioned bottom rail moving assembly, and the aforementioned bottom rail moving assembly is slidably engaged with the aforementioned slide rail base; The aforementioned slide rail base includes a base machining part, a linear slide rail, and a longitudinal rack, wherein the linear slide rail and the longitudinal rack are both mounted on the aforementioned base machining part; The aforementioned bottom rail moving assembly includes a bottom rail moving plate, a fixed block, a slider, a moving gear, a planetary reducer, and a first servo motor. The slider is mounted on the bottom rail moving plate via the fixed block. The slider slides in cooperation with the linear slide rail. The output end of the first servo motor is connected to the planetary reducer. The planetary reducer is connected to the moving gear. The moving gear meshes with the longitudinal rack. The aforementioned drive positioner includes a first housing assembly, a first clamping assembly, and a drive assembly; the aforementioned driven positioner includes a second housing assembly, a second clamping assembly, and a brake assembly; the aforementioned first housing assembly and the aforementioned second housing assembly have the same structure; the aforementioned first clamping assembly and the aforementioned second clamping assembly have the same structure. The first clamping assembly is rotatably connected to the first housing assembly, the drive assembly is drively connected to the first clamping assembly, the second clamping assembly is rotatably connected to the second housing assembly, and the brake assembly is brakeably connected to the second clamping assembly.

[0007] During operation, the first servo motor of the aforementioned bottom rail moving assembly outputs power, which drives the moving gear to rotate via the aforementioned planetary reducer. The moving gear meshes with the longitudinal rack of the aforementioned slide rail base, causing the slider to slide along the aforementioned linear slide rail, thereby moving the aforementioned bottom rail moving plate and the aforementioned driven positioner bolted thereon, adapting to different lengths of curved elbows. The aforementioned drive assembly is connected to the aforementioned first clamping assembly, causing the aforementioned first clamping assembly to rotate relative to the aforementioned first housing assembly. The aforementioned second clamping assembly can rotate synchronously relative to the aforementioned second housing assembly, realizing the rotational adjustment of the curved elbow. The aforementioned brake assembly can brake the aforementioned second clamping assembly, thereby braking the aforementioned first clamping assembly, thus fixing the rotational position of the elbow. The aforementioned first clamping assembly and the aforementioned second clamping assembly cooperate to complete the clamping of the curved elbow. The aforementioned drive positioner and the aforementioned driven positioner cooperate to drive the clamped elbow to complete the position adjustment required for welding.

[0008] This embodiment discloses a positioner applicable to welding chamfered elbows. Due to the presence of a matching slide rail base and a bottom rail moving assembly, and through the transmission of a first servo motor, a planetary reducer, a moving gear, and a longitudinal rack, the positioner can flexibly move to adapt to chamfered elbows of different lengths. Simultaneously, it is equipped with identical first and second housing assemblies, a first clamping assembly, and a second clamping assembly. Combined with a drive assembly that rotates the first clamping assembly and the second clamping assembly that rotates synchronously, the elbow's rotation can be adjusted. Furthermore, a braking assembly can brake the second clamping assembly and achieve elbow rotation adjustment. The rotation position of the head is fixed, and the aforementioned drive positioner and the aforementioned fixed frame, as well as the aforementioned driven positioner and the aforementioned bottom rail moving assembly, are all fixed with bolts. The aforementioned first clamp assembly and the aforementioned second clamp assembly can cooperate to complete the clamping of the elbow. The overall structure is reasonably designed, and the components work together to adapt to the welding position adjustment requirements of different specifications of small waist elbows, improving the adaptability of the equipment and the convenience of welding operations. As a result, a positioner applicable to the welding of small waist elbows can simultaneously adapt to the welding operations of small waist elbows with different diameters, lengths, and angles. It can flexibly and accurately adjust the weld to the optimal welding position, and the equipment has a high degree of integration and is easy to operate, effectively improving the efficiency and accuracy of welding operations.

[0009] Optionally: Both the first housing assembly and the second housing assembly include a housing machining part, a slewing bearing and a gear guard, wherein the slewing bearing is mounted on the housing machining part and the gear guard is disposed on the outside of the slewing bearing.

[0010] This configuration ensures the consistency of the structure between the drive positioner and the driven positioner, improving the convenience of overall equipment assembly and maintenance. It also protects the slewing bearing with the gear guard, effectively preventing the intrusion of impurities such as welding slag and dust during welding operations, extending the service life of the slewing bearing, and ensuring the stability and accuracy of its rotary transmission.

[0011] Optionally: Both the first clamp assembly and the second clamp assembly include an arm tilting assembly, a lifting seat assembly, an angled base, a semi-circular rack, an upper fin assembly, a lower fin assembly, a first lead screw, a second lead screw, a first reverse lead screw, a second reverse lead screw, a locking pin, a first coupling, and a second coupling. The semi-circular rack is fixed on the angled base, and the lifting seat assembly is slidably fixed on the arm tilting assembly. The first lead screw and the first reverse lead screw are connected through the first coupling, and the second lead screw and the second reverse lead screw are connected through the second coupling. The upper fin assembly cooperates with the first lead screw and the first reverse lead screw, and the lower fin assembly cooperates with the second lead screw and the second reverse lead screw. The locking pin is connected at the connection between the angled base and the lifting seat assembly.

[0012] This configuration ensures structural consistency between the first and second clamping components, improving the ease of equipment assembly, debugging, and maintenance. The combination of the first lead screw, the first reverse lead screw, the first coupling, the second lead screw, the second reverse lead screw, and the second coupling allows for smoother and more synchronized clamping and adjustment of the upper and lower fin components, adapting to the clamping requirements of elbows of different diameters. The sliding connection of the lifting seat component, combined with the limiting and fixing of the locking pin, and the cooperation of the semi-circular rack and the angle base, enables precise adjustment and fixing of the elbow welding angle, effectively improving the stability and accuracy of the welding operation.

[0013] Optionally: The above-mentioned arm tilting assembly includes a flange, a dovetail slide, a sliding cover, a lead screw, a lead screw nut, a second reducer, and a second servo motor. The flange is fixedly connected to the slewing bearing. The dovetail slide is disposed on the flange. The sliding cover is slidably engaged with the dovetail slide. The output end of the second servo motor is connected to the second reducer. The second reducer is drivenly connected to the lead screw. The lead screw nut is threadedly engaged with the lead screw and is bolted to the lifting seat assembly.

[0014] With this configuration, the aforementioned arm tilting assembly adopts the structure of fixing the flange and the slewing bearing, achieving a stable connection with the housing assembly and being able to rotate synchronously with the slewing bearing. The sliding fit between the dovetail slide and the sliding cover, combined with the threaded transmission structure of the lead screw and the lead screw nut, is driven by the second servo motor and the second reducer to achieve smooth and precise up and down movement of the lifting seat assembly. The bolt fixing of the lead screw nut and the lifting seat assembly improves the stability of the connection and the reliability of the transmission, ensuring the accuracy and stability of the up and down position adjustment during the welding of the shrimp waist elbow.

[0015] Optionally: The above-mentioned lifting seat assembly includes a lifting base, a first bearing seat, a second bearing seat, a bearing, a cylindrical gear, a third reducer, and a third motor. The lifting base is fixedly connected to the sliding cover and the lead screw nut bolt. The first bearing seat and the second bearing seat are symmetrically installed on the lifting base. The two ends of the bearing are respectively disposed in the first bearing seat and the second bearing seat. The cylindrical gear is located on the bearing. The output end of the third motor is drivenly connected to the third reducer. The output end of the third reducer is drivenly connected to the bearing. The cylindrical gear meshes with the semi-circular rack.

[0016] With this configuration, the lifting seat assembly adopts a structure where the lifting base is fixed to the sliding cover and the screw nut bolts, achieving a stable connection with the arm tilting assembly and enabling synchronous movement. The first bearing seat and the second bearing seat are symmetrically installed and cooperate with the bearings to form a stable support for the rotation of the cylindrical gear. The third motor, in conjunction with the third reducer, drives the bearings to rotate the cylindrical gear, which then meshes with the semi-circular rack to achieve precise spatial angle adjustment of the angle base. The overall structure has smooth transmission and reliable support, ensuring the accuracy and stability of the welding angle adjustment of the shrimp waist elbow. At the same time, the symmetrical bearing seat design also improves the structural strength and service life of the assembly.

[0017] Optionally: The drive assembly includes a reducer bracket, a drive gear, a transmission shaft, an external shaft motor, and an external reducer. The reducer bracket is mounted on the first housing assembly. The output end of the external shaft motor is connected to the external reducer. The external reducer is connected to the transmission shaft. The drive gear is mounted on the transmission shaft and meshes with the slewing bearing.

[0018] This configuration not only improves transmission torque and rotational stability through the deceleration structure, but also precisely drives the aforementioned slewing bearing to rotate the fixture assembly 360 degrees, ensuring that the weld seam of the shrimp-shaped elbow can be precisely adjusted to the required welding position. The overall transmission structure is compact, the power transmission is reliable, and it is suitable for the precise rotation requirements of welding operations.

[0019] Optionally, both the first clamping assembly and the second clamping assembly further include an upper fin nut, an upper fin nut with reverse thread, a lower fin nut, and a lower fin nut with reverse thread; the upper fin nut and the upper fin nut with reverse thread are threadedly engaged with the first lead screw and the first reverse lead screw, respectively, and are bolted to a first jaw and a second jaw; the lower fin nut and the lower fin nut with reverse thread are threadedly engaged with the second lead screw and the second reverse lead screw, respectively, and are bolted to a third jaw and a fourth jaw.

[0020] This configuration allows for more synchronized clamping and adjustment of the upper and lower fin assemblies, resulting in more balanced force distribution. It can adapt to the clamping requirements of elbows with different diameters, improving clamping stability and ease of adjustment. It also prevents the elbow from shifting during welding rotation and angle adjustment, ensuring the accuracy of the welding operation.

[0021] Optionally, the upper fin nut is a positive thread nut, and the upper fin nut is a negative thread nut, and the two are symmetrically arranged on both sides of the upper fin assembly.

[0022] This configuration ensures that the upper fin assembly is subjected to symmetrical force and moves smoothly during adjustment. It can quickly adapt to the clamping and positioning requirements of different diameter shrimp-shaped elbows, improve the coaxiality and stability of the clamping, prevent the upper fin assembly from tilting during adjustment, and ensure the positional accuracy of the elbow during welding.

[0023] Optionally, the lower fin nut is a positive thread nut, and the lower fin nut is a negative thread nut, and the two are symmetrically arranged on both sides of the lower fin assembly.

[0024] This configuration ensures that the lower fin assembly is subjected to uniform force and moves smoothly during adjustment. It can quickly adapt to the clamping requirements of shrimp-shaped elbows of different diameters, improve the coaxiality and stability of the lower fin assembly clamping, avoid skewing and displacement of the fin assembly during adjustment and welding, and ensure the positional accuracy of the shrimp-shaped elbow welding.

[0025] Optionally, the number of cylindrical gears in the above-mentioned lifting seat assembly is two, the two cylindrical gears are symmetrically arranged, and both mesh with the above-mentioned semi-circular rack.

[0026] This configuration ensures uniform transmission force and stable meshing, effectively preventing jamming or uneven loading during angle adjustment, improving the accuracy and synchronization of angle adjustment, and enhancing the structural strength and operational reliability of the components.

[0027] In summary, the positioner disclosed in this invention, applicable to the welding of small elbows, can simultaneously adapt to welding operations of small elbows with different diameters, lengths, and angles. It can flexibly and accurately adjust the weld to the optimal welding position, and the equipment has a high degree of integration and is easy to operate, effectively improving the efficiency and accuracy of welding operations. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a front view of a positioner applicable to the welding of shrimp waist bends in an embodiment of the present invention; Figure 2 This is a top view of a positioner applicable to the welding of shrimp waist bends in an embodiment of the present invention; Figure 3 This is a top view of the slide rail base in an embodiment of the present invention; Figure 4 This is a side view of the slide rail base in an embodiment of the present invention; Figure 5 This refers to the bottom rail moving component in the embodiments of the present invention; Figure 6 This is a partially cut-out side view of the drive positioner in an embodiment of the present invention; Figure 7 This is a partial cutaway side view of the driven positioner in an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the first housing assembly and the second housing assembly in an embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of the first clamping assembly and the second clamping assembly in an embodiment of the present invention; Figure 10 This is a cross-sectional view of the upper fin assembly in an embodiment of the present invention; Figure 11 This is a cross-sectional view of the lower fin assembly in an embodiment of the present invention; Figure 12 This is a front view of the arm flipping assembly in an embodiment of the present invention; Figure 13 This is a top view of the arm flipping assembly in an embodiment of the present invention; Figure 14 This is a front view of the lifting seat assembly in an embodiment of the present invention; Figure 15 This is a cross-sectional view showing the connection between the arm tilting assembly and the lifting seat assembly in an embodiment of the present invention; Figure 16 This is a schematic diagram of the structure of the driving component in an embodiment of the present invention.

[0030] Icons: 1-Slide rail base, 2-Fixed frame, 3-Bottom rail moving assembly, 4-Drive positioner, 5-Driven positioner, 6-Base machining part, 7-Linear slide rail, 8-Longitudinal rack, 9-Bottom rail moving plate, 10-Fixed block, 11-Slider, 12-Moving gear, 13-Planetary reducer, 14-First servo motor, 15-First housing assembly, 16-First clamping assembly, 17-Drive assembly, 18-Second housing assembly, 19-Second clamping assembly, 20-Brake assembly, 21-Housing machining part, 22-Slewing bearing, 23-Gear cover, 24-Arm tilting assembly, 25-Lifting seat assembly, 26-Angle base, 27-Semi-circular rack, 28-Upper fin assembly, 29-Lower fin assembly, 30-First lead screw, 31-Second lead screw, 32-First reverse lead screw, 33-Second... 34-Locking pin, 35-First coupling, 36-Second coupling, 37-Flange, 38-Dovetail slide, 39-Sliding cover, 40-Leading screw, 41-Leading screw nut, 42-Second reducer, 43-Second servo motor, 44-Lifting base, 45-First bearing seat, 46-Second bearing seat, 47-Bearing, 48-Spiral gear, 49-Third reducer, 50-Third motor, 51-Reducer bracket, 52-Drive gear, 53-Transmission shaft, 54-External shaft motor, 55-External reducer, 56-Upper fin nut, 57-Upper fin nut with reverse thread, 58-Lower fin nut, 59-Lower fin nut with reverse thread, 60-First gripper, 61-Second gripper, 62-Third gripper, 63-Fourth gripper, 64-Lifting reinforcing rib, 65-Connecting plate, 66-Turn switch end. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0033] Example See Figures 1 to 16This embodiment proposes a positioner applicable to the welding of shrimp waist bends, including an automated control system (not shown in the figure) that coordinates the operation of a control slide rail base 1, a fixed frame 2, a bottom rail moving assembly 3, a drive positioner 4, and a driven positioner 5. The drive positioner 4 is bolted to the fixed frame 2, and the driven positioner 5 is bolted to the bottom rail moving assembly 3. The bottom rail moving assembly 3 is slidably engaged with the slide rail base 1. The slide rail base 1 includes a base machining part 6, a linear slide rail 7 and a longitudinal rack 8, with the linear slide rail 7 and the longitudinal rack 8 both mounted on the base machining part 6. The bottom rail moving assembly 3 includes a bottom rail moving plate 9, a fixed block 10, a slider 11, a moving gear 12, a planetary reducer 13, and a first servo motor 14. The slider 11 is mounted on the bottom rail moving plate 9 through the fixed block 10. The slider 11 is slidably engaged with the linear slide rail 7. The output end of the first servo motor 14 is connected to the planetary reducer 13. The planetary reducer 13 is connected to the moving gear 12 in a transmission connection. The moving gear 12 meshes with the longitudinal rack 8. The drive positioner 4 includes a first housing assembly 15, a first clamping assembly 16 and a drive assembly 17, and the driven positioner 5 includes a second housing assembly 18, a second clamping assembly 19 and a brake assembly 20. The first housing assembly 15 and the second housing assembly 18 have the same structure, and the first clamping assembly 16 and the second clamping assembly 19 have the same structure. The first clamping assembly 16 is rotatably connected to the first housing assembly 15, the drive assembly 17 is drively connected to the first clamping assembly 16, the second clamping assembly 19 is rotatably connected to the second housing assembly 18, and the brake assembly 20 is brakeably connected to the second clamping assembly 19.

[0034] During operation, the first servo motor 14 of the bottom rail moving assembly 3 outputs power, which drives the moving gear 12 to rotate via the planetary reducer 13. The moving gear 12 meshes with the longitudinal rack 8 of the slide rail base 1, causing the slider 11 to slide along the linear slide rail 7, thereby moving the bottom rail moving plate 9 and the driven positioner 5 bolted on it to adapt to different lengths of curved elbows. The drive assembly 17 is connected to the first clamp assembly 16, which drives the first clamp assembly 16 to rotate relative to the first housing assembly 15. The second clamp assembly 19 can rotate synchronously relative to the second housing assembly 18 to realize the rotation adjustment of the curved elbow. The brake assembly 20 can brake the second clamp assembly 19, thereby braking the first clamp assembly 16 to fix the rotation position of the elbow. The first clamp assembly 16 and the second clamp assembly 19 cooperate to clamp the curved elbow. The drive positioner 4 and the driven positioner 5 cooperate to drive the clamped elbow to complete the position adjustment required for welding.

[0035] This embodiment discloses a positioner applicable to the welding of shrimp-shaped elbows. Due to the matching slide rail base 1 and bottom rail moving component 3, and through the transmission cooperation of a first servo motor 14, planetary reducer 13, moving gear 12, and longitudinal rack 8, it can drive a driven positioner 5 to move flexibly to adapt to shrimp-shaped elbows of different lengths. Simultaneously, it is equipped with a first housing component 15, a second housing component 18, a first clamping component 16, and a second clamping component 19 with identical structures. Combined with a drive component 17 driving the first clamping component 16 to rotate and the second clamping component 19 to rotate synchronously, it can realize the rotational adjustment of the elbow. With the brake component 20, it can brake the second clamping component 19 and realize the bending... The head rotation position is fixed, and the drive positioner 4 and the fixed frame 2, the driven positioner 5 and the bottom rail moving assembly 3 are all fixed with bolts. The first clamp assembly 16 and the second clamp assembly 19 can cooperate to complete the clamping of the elbow. The overall structure is reasonably designed, and the components work together to adapt to the welding position adjustment needs of different specifications of small waist elbows, which improves the adaptability of the equipment and the convenience of welding operations. Thus, a positioner that can be used for welding small waist elbows can simultaneously adapt to welding operations of small waist elbows with different diameters, lengths and angles. It can flexibly and accurately adjust the weld to the best welding position. Moreover, the equipment has a high degree of integration and is easy to operate, which effectively improves the efficiency and accuracy of welding operations.

[0036] See Figures 1 to 16 Both the first housing assembly 15 and the second housing assembly 18 include a housing machining part 21, a slewing bearing 22, and a gear cover 23. The slewing bearing 22 is mounted on the housing machining part 21, and the gear cover 23 is placed on the outside of the slewing bearing 22. This ensures the consistency of the structure of the driving positioner 4 and the driven positioner 5, improves the convenience of overall equipment assembly and maintenance, and also protects the slewing bearing 22 through the gear cover 23, effectively preventing the intrusion of impurities such as welding slag and dust during welding operations, extending the service life of the slewing bearing 22, and ensuring the stability and accuracy of its rotational transmission.

[0037] See Figures 1 to 16The first clamp assembly 16 and the second clamp assembly 19 both include an arm tilting assembly 24, a lifting seat assembly 25, an angle base 26, a semi-circular rack 27, an upper fin assembly 28, a lower fin assembly 29, a first lead screw 30, a second lead screw 31, a first reverse lead screw 32, a second reverse lead screw 33, a locking pin 34, a first coupling 35, and a second coupling 36. The semi-circular rack 27 is fixed to the angle base 26, and the lifting seat assembly 25 is slidably fixed to the arm tilting assembly 24. The first lead screw 30 and the first reverse lead screw 32 are connected by the first coupling 35, and the second lead screw 31 and the second reverse lead screw 33 are connected by the second coupling 36. The upper fin assembly 28 cooperates with the first lead screw 30 and the first reverse lead screw 32, and the lower fin assembly 29 cooperates with the second lead screw 31 and the first reverse lead screw 32. The second reverse screw 33, in conjunction with the locking pin 34, connects the angle base 26 and the lifting seat assembly 25, ensuring the structural consistency of the first clamp assembly 16 and the second clamp assembly 19, and improving the convenience of equipment assembly, debugging and maintenance. The arrangement of the first screw 30, the first reverse screw 32, and the first coupling 35, and the second screw 31, the second reverse screw 33, and the second coupling 36, makes the clamping adjustment of the upper and lower fin assemblies 29 more stable and synchronous, and can adapt to the clamping requirements of elbows of different diameters. The sliding connection of the lifting seat assembly 25, combined with the limiting and fixing of the locking pin 34, and the cooperation of the semi-circular rack 27 and the angle base 26, can realize the precise adjustment and fixing of the elbow welding angle, effectively improving the stability and accuracy of the welding operation.

[0038] See Figures 1 to 16 The arm tilting assembly 24 includes a flange 37, a dovetail slide 38, a sliding cover 39, a lead screw 40, a lead screw nut 41, a second reducer 42, and a second servo motor 43. The flange 37 is fixedly connected to the slewing bearing 22. The dovetail slide 38 is mounted on the flange 37, and the sliding cover 39 is slidably fitted with the dovetail slide 38. The output end of the second servo motor 43 is connected to the second reducer 42, and the second reducer 42 is drive-connected to the lead screw 40. The lead screw nut 41 is threadedly fitted to the lead screw 40 and bolted to the lifting seat assembly 25. The arm tilting assembly 24 adopts... The structure of flange 37 fixed to slewing bearing 22 achieves a stable connection with the housing assembly and can rotate synchronously with slewing bearing 22. The sliding fit between dovetail slide 38 and slide cover 39, together with the threaded transmission structure of lead screw 40 and lead screw nut 41, is driven by second servo motor 43 and second reducer 42 to achieve smooth and precise up and down movement of lifting seat assembly 25. The bolt fixing of lead screw nut 41 to lifting seat assembly 25 improves the stability of the connection and the reliability of the transmission, ensuring the accuracy and stability of the up and down position adjustment during the welding of the shrimp waist elbow.

[0039] See Figures 1 to 16The lifting seat assembly 25 includes a lifting base 44, a first bearing seat 45, a second bearing seat 46, a bearing 47, a cylindrical gear 48, a third reducer 49, and a third motor 50. The lifting base 44 is bolted to the sliding cover 39 and the lead screw nut 41. The first bearing seat 45 and the second bearing seat 46 are symmetrically mounted on the lifting base 44. The two ends of the bearing 47 are respectively located in the first bearing seat 45 and the second bearing seat 46. The cylindrical gear 48 is located on the bearing 47. The output end of the third motor 50 is driven by the third reducer 49, and the output end of the third reducer 49 is driven by the bearing 47. The cylindrical gear 48 meshes with the semi-circular rack 27. 5. The structure of the lifting base 44 and the sliding cover 39 and the screw nut 41 is fixed together to achieve a stable connection with the arm tilting assembly 24 and can move synchronously with it. The first bearing seat 45 and the second bearing seat 46 are symmetrically installed and cooperate with the bearing 47 to form a stable support for the rotation of the cylindrical gear 48. The bearing 47 is driven by the third motor 50 and the third reducer 49 to rotate the cylindrical gear 48, and then meshes with the semi-circular rack 27 to achieve precise spatial angle adjustment of the angle base 26. The overall structure has smooth transmission and reliable support, which ensures the accuracy and stability of the welding angle adjustment of the shrimp waist bend. At the same time, the symmetrical bearing seat design also improves the structural strength and service life of the assembly.

[0040] See Figures 1 to 16 The drive assembly 17 includes a reducer bracket 51, a drive gear 52, a transmission shaft 53, an external shaft motor 54, and an external reducer 55. The reducer bracket 51 is mounted on the first housing assembly 15. The output end of the external shaft motor 54 is connected to the external reducer 55. The external reducer 55 is connected to the transmission shaft 53. The drive gear 52 is mounted on the transmission shaft 53 and meshes with the slewing bearing 22. This not only improves the transmission torque and rotational stability through the reduction structure, but also accurately drives the slewing bearing 22 to drive the clamp assembly to rotate 360 ​​degrees, ensuring that the weld seam of the shrimp-shaped elbow can be accurately adjusted to the position required for welding. The overall transmission structure is compact, the power transmission is reliable, and it is suitable for the precise rotation requirements of welding operations.

[0041] Both the first clamping assembly 16 and the second clamping assembly 19 further include an upper fin nut 56, an upper fin nut with reverse thread 57, a lower fin nut 58, and a lower fin nut with reverse thread 59. The upper fin nut 56 and the upper fin nut with reverse thread 57 are threadedly engaged with the first lead screw 30 and the first reverse lead screw 32, respectively, and are bolted to the first jaw 60 and the second jaw 61, respectively. The lower fin nut 58 and the lower fin nut with reverse thread 59 are threadedly engaged with the second lead screw 31 and the second reverse lead screw 33, respectively, and are bolted to the third jaw 62 and the fourth jaw 63, respectively. This makes the clamping adjustment of the upper fin assembly 28 and the lower fin assembly 29 more synchronized and the force more balanced, which can adapt to the clamping requirements of different diameter elbows, improve the stability of clamping and the convenience of adjustment, prevent the elbow from shifting during welding rotation and angle adjustment, and ensure the accuracy of welding operations.

[0042] See Figures 1 to 16 The upper fin nut 56 is a positive thread nut, and the upper fin nut 57 is a negative thread nut. The two are symmetrically arranged on both sides of the upper fin assembly 28. This makes the upper fin assembly 28 symmetrically stressed and move smoothly during adjustment. It can quickly adapt to the clamping and positioning requirements of different diameter elbows, improve the coaxiality and stability of clamping, avoid the upper fin assembly 28 from tilting during adjustment, and ensure the positional accuracy of the elbow during welding.

[0043] The lower fin nut 58 is a positive thread nut, and the lower fin nut 59 is a negative thread nut. The two are symmetrically arranged on both sides of the lower fin assembly 29. This makes the lower fin assembly 29 evenly stressed and move smoothly during adjustment. It can quickly adapt to the clamping requirements of shrimp waist elbows of different diameters, improve the coaxiality and stability of the lower fin assembly 29 clamping, avoid the fin assembly from tilting and shifting during adjustment and welding, and ensure the positional accuracy of the shrimp waist elbow welding.

[0044] The lifting seat assembly 25 contains two cylindrical gears 48, which are symmetrically arranged and mesh with the semi-circular rack 27. This ensures uniform transmission force and stable meshing, effectively preventing jamming or uneven loading during angle adjustment, improving the accuracy and synchronization of angle adjustment, and enhancing the structural strength and operational reliability of the assembly.

[0045] See Figures 1 to 16 In this embodiment, the lead screw 40 of the arm tilting assembly 24 is arranged parallel to the dovetail slide rail 38, and the lifting seat assembly 25 is equipped with two cylindrical gears 48, which are symmetrically arranged and mesh with the semi-circular rack 27. The longitudinal rack 8 of the slide rail base 1 extends in a direction parallel to the extension direction of the linear slide rail 7. The slewing bearing 22 adopts an external tooth structure, and the drive gear 52 of the drive assembly 17 meshes with the external teeth of the external tooth slewing bearing 22. The bottom rail moving assembly 3 slides along the linear slide rail 7 of the slide rail base 1 through its slider 11.

[0046] See Figures 1 to 16 In this embodiment, the first servo motor 14, the second servo motor 43, the third motor 50, and the external shaft motor 54 are all electrically connected to an external power supply, which provides stable operating power to each motor. At the same time, the first servo motor 14, the second servo motor 43, the third motor 50, and the external shaft motor 54 are all electrically connected to an automated control system, which enables unified regulation of each motor, precisely controlling the start, stop, speed, and direction of each motor, and ensuring the precise linkage and coordinated operation of each action of the positioner.

[0047] See Figures 1 to 16 In this embodiment, the first gripper 60, the second gripper 61, the third gripper 62 and the fourth gripper 63 are all pneumatic grippers, replacing the traditional manual adjustment method, realizing the pneumatic automatic gripping and releasing of the shrimp waist bend head, greatly improving the efficiency and convenience of gripping operation, and reducing the intensity of manual operation.

[0048] See Figures 1 to 16 In this embodiment, the lifting base 44 is provided with several evenly distributed lifting reinforcing ribs 64 on both sides. The lifting reinforcing ribs 64 can significantly enhance the structural strength and rigidity of the lifting base, effectively distribute the weight of the clamping components and the waist bends carried by the lifting base 44, avoid deformation and shaking of the lifting base 44 during lifting and angle adjustment, ensure the stability and accuracy of the overall transmission of the lifting base assembly 25, and improve the fatigue resistance and service life of the lifting base 44, adapting to the long-term stable use requirements of welding operations.

[0049] See Figures 1 to 16 In this embodiment, the bottom surfaces of the upper fin assembly 28 and the lower fin assembly 29 are bolted to a connecting plate 65. The connecting plate 65 is bolted to the end of the angle base 26 away from the lifting component. The double-layer bolted connection improves the firmness and stability of the connection between the upper fin assembly 28 and the lower fin assembly 29 and the angle base 26, preventing the upper fin assembly 28 and the lower fin assembly 29 from loosening or shifting during clamping and rotation with the angle base 26. At the same time, the detachable structure of the bolted connection facilitates the disassembly, replacement and maintenance of the upper fin assembly 28 and the lower fin assembly 29. It can also flexibly adapt to different upper fin assemblies 28 and lower fin assemblies 29 according to the specifications of the waist bend, improving the adaptability and maintenance convenience of the equipment.

[0050] See Figures 1 to 16In this embodiment, the outer ends of the first lead screw 30, the first reverse lead screw 32, the second lead screw 31, and the second reverse lead screw 33 are all equipped with a lever end 66. A wrench is adapted to the lever end 66 and drives the first lead screw 30 and the first reverse lead screw 32 or the second lead screw 31 and the second reverse lead screw 33 to rotate, thereby causing the first jaw 60 and the second jaw 61 or the third jaw 62 and the fourth jaw 63 to move closer or further apart.

[0051] See Figures 1 to 16 The specific working principle of the positioner applicable to the welding of shrimp waist bends in this embodiment is as follows: 1. When this positioner is working, the external power supply provides stable power to the first servo motor 14, the second servo motor 43, the third motor 50, and the external shaft motor 54. The automatic control system uniformly regulates all motors, precisely controlling the start, stop, speed, and direction of each motor to achieve coordinated operation of all components. In the initial stage of operation, according to the length requirements of the bend, the control system drives the first servo motor 14 of the bottom rail moving component 3 to output power. The power is transmitted to the moving gear 12 through the planetary reducer 13, so that the moving gear 12 meshes with the longitudinal rack 8 on the slide rail base 1 and rotates, driving the slider 11 to slide left and right along the linear slide rail 7 on the base processing part 6. The slider 11 drives the bottom rail moving plate 9 and the driven positioner 5 bolted on it to move synchronously through the fixing block 10 until the distance between the driving positioner 4 and the driven positioner 5 matches the length of the bend, and the extension direction of the longitudinal rack 8 of the slide rail base 1 is parallel to the extension direction of the linear slide rail 7, ensuring smooth and accurate movement.

[0052] 2. After the spacing is adjusted to the correct position, clamp the shrimp-shaped waist bend between the first clamp assembly 16 and the second clamp assembly 19. The upper fin assembly 28 and lower fin assembly 29 of the clamps, in conjunction with the first lead screw 30, the first reverse lead screw 32, the second lead screw 31, and the second reverse lead screw 33, and their corresponding first jaws 60, second jaws 61, third jaws 62, and fourth jaws 63, complete the initial clamping. The upper fin nut 56 and the upper fin nut reverse thread 57 are symmetrically arranged on both sides of the upper fin assembly 28 and screwed with the corresponding first lead screw 30 and first reverse lead screw 32. The lower fin nut 58 and the lower fin nut reverse thread 59 are symmetrically arranged on both sides of the lower fin assembly 29 and are threadedly engaged with the corresponding second lead screw 31 and second reverse lead screw 33, so that the fin assembly is clamped with uniform and stable force, and is compatible with different diameters of bent heads. The first coupling 35 and the second coupling 36 respectively ensure the coaxial linkage of the first lead screw 30 and the first reverse lead screw 32 and the second lead screw 31 and the second reverse lead screw 33. The locking pin 34 limits and fixes the connection position between the angle base 26 and the lifting seat assembly 25 after the angle is adjusted.

[0053] 3. For the vertical position adjustment required for welding, the second servo motor 43 of the control system drive arm tilting assembly 24 outputs power, which is transmitted to the lead screw 40 through the second reducer 42. This causes the lead screw nut 41 to engage with the lead screw thread and drive the lifting seat assembly 25 to slide up and down along the dovetail slide 38 on the flange 37. The lead screw 40 of the arm tilting assembly 24 and the dovetail slide 38 are set in parallel to ensure smooth and precise lifting. The lifting base 44, the sliding cover 39, and the lead screw nut 41 are fixed with bolts to improve the stability of the connection and the reliability of the transmission.

[0054] 4. For the spatial angle adjustment of the bend, the third motor 50 of the lifting seat assembly 25 outputs power, which is transmitted to the bearing 47 via the third reducer 49. The bearing 47 is mounted on the lifting base 44 with the first bearing seat 45 and the second bearing seat 46 symmetrically installed at both ends, which drives the two cylindrical gears 48 on the bearing 47 to rotate synchronously. The two cylindrical gears 48 are symmetrically arranged and both mesh with the semi-circular rack 27 on the angle base 26, so that the transmission force is uniform and the meshing is stable, which drives the angle base 26 to achieve precise spatial angle rotation to meet the weld adjustment requirements of bends with different angles.

[0055] 5. For the 360-degree rotation adjustment of the weld, the external shaft motor 54 of the drive assembly 17 outputs power, which is transmitted to the drive shaft 53 through the external reducer 55, driving the drive gear 52 on the drive shaft 53 to rotate. The reducer bracket 51 securely mounts the drive assembly 17 on the first housing assembly 15. The drive gear 52 meshes with the external teeth of the external gear slewing bearing 22. The slewing bearing 22 is mounted on the housing machining part 21 and is protected by a gear cover 23 on the outside. The power is transmitted through the slewing bearing 22 to the flange 37 of the arm tilting assembly 24, driving the first clamp assembly 16 to rotate relative to the first housing assembly 15. The second clamp assembly 19 rotates synchronously with the elbow relative to the second housing assembly 18, realizing the 360-degree rotation of the elbow without dead angles, and precisely adjusting the weld to the optimal welding position.

[0056] 6. After the weld position and angle are adjusted to the required welding state, the brake assembly 20 of the driven positioner 5 brakes the second clamp assembly 19 to fix the rotation position of the elbow and prevent displacement during welding. The first housing assembly 15 and the second housing assembly 18 have the same structure, and the first clamp assembly 16 and the second clamp assembly 19 have the same structure, ensuring the consistency of clamping and transmission. All components work together to complete the welding and positioning of small waist elbows with different diameters, lengths and angles. After welding is completed, the control system reverses the control of each motor to drive each component to reset. The clamp can be released to remove the processed small waist elbow.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A positioner suitable for welding the waist bend of shrimp, characterized in that: An automated control system that coordinates the operation of a control slide rail base (1), a fixed frame (2), a bottom rail moving assembly (3), a drive positioner (4), and a driven positioner (5); The drive positioner (4) is bolted to the fixed frame (2), and the driven positioner (5) is bolted to the bottom rail moving assembly (3). The bottom rail moving assembly (3) is slidably engaged with the slide rail base (1). The slide rail base (1) includes a base machining part (6), a linear slide rail (7) and a longitudinal rack (8), wherein the linear slide rail (7) and the longitudinal rack (8) are both disposed on the base machining part (6); The bottom rail moving assembly (3) includes a bottom rail moving plate (9), a fixed block (10), a slider (11), a moving gear (12), a planetary reducer (13), and a first servo motor (14). The slider (11) is mounted on the bottom rail moving plate (9) through the fixed block (10). The slider (11) is slidably engaged with the linear slide rail (7). The output end of the first servo motor (14) is connected to the planetary reducer (13). The planetary reducer (13) is connected to the moving gear (12) in a transmission connection. The moving gear (12) meshes with the longitudinal rack (8). The drive positioner (4) includes a first housing assembly (15), a first clamping assembly (16) and a drive assembly (17), and the driven positioner (5) includes a second housing assembly (18), a second clamping assembly (19) and a brake assembly (20). The first housing assembly (15) and the second housing assembly (18) have the same structure, and the first clamping assembly (16) and the second clamping assembly (19) have the same structure. The first clamping assembly (16) is rotatably connected to the first housing assembly (15), the driving assembly (17) is drively connected to the first clamping assembly (16), the second clamping assembly (19) is rotatably connected to the second housing assembly (18), and the braking assembly (20) is brakeably connected to the second clamping assembly (19).

2. The positioner applicable to welding of shrimp-shaped bends according to claim 1, characterized in that: Both the first housing assembly (15) and the second housing assembly (18) include a housing machining part (21), a slewing bearing (22) and a gear guard (23). The slewing bearing (22) is mounted on the housing machining part (21), and the gear guard (23) covers the outside of the slewing bearing (22).

3. A positioner applicable to the welding of shrimp-shaped bends according to claim 2, characterized in that: Both the first clamp assembly (16) and the second clamp assembly (19) include an arm tilting assembly (24), a lifting seat assembly (25), an angle base (26), a semi-circular rack (27), an upper fin assembly (28), a lower fin assembly (29), a first lead screw (30), a second lead screw (31), a first reverse lead screw (32), a second reverse lead screw (33), a locking pin (34), a first coupling (35), and a second coupling (36). The semi-circular rack (27) is fixed on the angle base (26), and the lifting seat assembly (25) is slidably fixed on the arm tilting assembly (24). On the rotating assembly (24), the first lead screw (30) and the first reverse lead screw (32) are connected by the first coupling (35), the second lead screw (31) and the second reverse lead screw (33) are connected by the second coupling (36), the upper fin assembly (28) cooperates with the first lead screw (30) and the first reverse lead screw (32), the lower fin assembly (29) cooperates with the second lead screw (31) and the second reverse lead screw (33), and the locking pin (34) is connected at the connection between the angle base (26) and the lifting seat assembly (25).

4. A positioner applicable to the welding of shrimp-shaped bends according to claim 3, characterized in that: The arm tilting assembly (24) includes a flange (37), a dovetail slide (38), a sliding cover (39), a lead screw (40), a lead screw nut (41), a second reducer (42), and a second servo motor (43). The flange (37) is fixedly connected to the slewing bearing (22). The dovetail slide (38) is disposed on the flange (37). The sliding cover (39) is slidably engaged with the dovetail slide (38). The output end of the second servo motor (43) is connected to the second reducer (42). The second reducer (42) is drivenly connected to the lead screw (40). The lead screw nut (41) is threadedly engaged with the lead screw (40) and is bolted to the lifting seat assembly (25).

5. A positioner applicable to the welding of shrimp-shaped bends according to claim 3, characterized in that: The lifting seat assembly (25) includes a lifting base (44), a first bearing seat (45), a second bearing seat (46), a bearing (47), a cylindrical gear (48), a third reducer (49), and a third motor (50). The lifting base (44) is bolted to the sliding cover (39) and the lead screw nut (41). The first bearing seat (45) and the second bearing seat (46) are symmetrically mounted on the lifting base (44). The two ends of the bearing (47) are respectively located in the first bearing seat (45) and the second bearing seat (46). The cylindrical gear (48) is located on the bearing (47). The output end of the third motor (50) is driven to the third reducer (49). The output end of the third reducer (49) is driven to the bearing (47). The cylindrical gear (48) meshes with the semi-circular rack (27).

6. A positioner applicable to the welding of shrimp-shaped bends according to claim 2, characterized in that: The drive assembly (17) includes a reducer bracket (51), a drive gear (52), a transmission shaft (53), an external shaft motor (54), and an external reducer (55). The reducer bracket (51) is mounted on the first housing assembly (15). The output end of the external shaft motor (54) is connected to the external reducer (55). The external reducer (55) is connected to the transmission shaft (53). The drive gear (52) is mounted on the transmission shaft (53) and meshes with the slewing bearing (22).

7. A positioner applicable to the welding of shrimp-shaped bends according to claim 3, characterized in that: Both the first clamping assembly (16) and the second clamping assembly (19) further include an upper fin nut (56), an upper fin nut reverse thread (57), a lower fin nut (58), and a lower fin nut reverse thread (59); the upper fin nut (56) and the upper fin nut reverse thread (57) are threadedly engaged with the first lead screw (30) and the first reverse lead screw (32) respectively, and are respectively bolted to a first jaw (60) and a second jaw (61); the lower fin nut (58) and the lower fin nut reverse thread (59) are threadedly engaged with the second lead screw (31) and the second reverse lead screw (33) respectively, and are respectively bolted to a third jaw (62) and a fourth jaw (63).

8. A positioner applicable to the welding of shrimp-shaped bends according to claim 7, characterized in that: The upper fin nut (56) is a positive thread nut, and the upper fin nut reverse thread (57) is a reverse thread nut. The two are symmetrically arranged on both sides of the upper fin assembly (28).

9. A positioner applicable to welding shrimp-shaped bends according to claim 7, characterized in that: The lower fin nut (58) is a positive thread nut, and the lower fin nut reverse thread (59) is a reverse thread nut. The two are symmetrically arranged on both sides of the lower fin assembly (29).

10. A positioner applicable to the welding of shrimp-shaped bends according to claim 5, characterized in that: The lifting seat assembly (25) has two cylindrical gears (48), which are symmetrically arranged and both mesh with the semi-circular rack (27).

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